<template>
    <div class="memory-game">
        <h1>记忆翻牌游戏</h1>
        <div class="game-info">
            <div>分数: {{ score }}</div>
            <div>剩余配对: {{ remainingPairs }}</div>
            <div>尝试次数: {{ tries }}</div>
            <button @click="resetGame" class="reset-btn">重新开始</button>
        </div>
        <div class="cards-container" :style="gridStyle">
            <div v-for="(card, index) in cards" :key="index" class="card"
                :class="{ flipped: card.isFlipped, matched: card.isMatched }" @click="flipCard(index)">
                <div class="card-face card-front">
                    <img :src="card.image" :alt="'卡片' + card.value" />
                </div>
                <div class="card-face card-back"></div>
            </div>
        </div>
        <div v-if="gameOver" class="game-over">
            <h2>恭喜你赢了！</h2>
            <p>你的最终得分: {{ score }}</p>
            <p>总尝试次数: {{ tries }}</p>
            <button @click="resetGame" class="reset-btn">再玩一次</button>
        </div>
    </div>
</template>
<script>
import { ref, computed, onMounted } from "vue";
export default {
    setup() {
        // 卡片图片 - 实际项目中应该放在 public 或 assets 目录
        const cardImages = [
            "https://picsum.photos/id/10/100/100",
            "https://picsum.photos/id/11/100/100",
            "https://picsum.photos/id/12/100/100",
            "https://picsum.photos/id/13/100/100",
            "https://picsum.photos/id/14/100/100",
            "https://picsum.photos/id/15/100/100",
            "https://picsum.photos/id/16/100/100",
            "https://picsum.photos/id/17/100/100",
        ];
        // 游戏状态
        const cards = ref([]);
        const flippedCards = ref([]);
        const score = ref(0);
        const tries = ref(0);
        const gameOver = ref(false);
        const difficulty = ref("medium"); // easy: 4x2, medium: 4x4, hard: 6x6
        // 计算属性
        const remainingPairs = computed(() => {
            const totalPairs = cards.value.length / 2;
            const matchedPairs =
                cards.value.filter((card) => card.isMatched).length / 2;
            return totalPairs - matchedPairs;
        });
        const gridStyle = computed(() => {
            let columns;
            switch (difficulty.value) {
                case "easy":
                    columns = 4;
                    break;
                case "hard":
                    columns = 6;
                    break;
                default:
                    columns = 4;
            }
            return {
                "grid-template-columns": `repeat(${columns}, 1fr)`,
            };
        });
        // 初始化游戏
        const initializeGame = () => {
            gameOver.value = false;
            score.value = 0;
            tries.value = 0;
            flippedCards.value = [];
            // 创建卡片对
            let cardValues = [];
            const pairsCount =
                difficulty.value === "easy" ? 4 : difficulty.value === "hard" ? 18 :
                    8;
            for (let i = 0; i < pairsCount; i++) {
                const imgIndex = i % cardImages.length;
                cardValues.push({ value: i, image: cardImages[imgIndex] });
                cardValues.push({ value: i, image: cardImages[imgIndex] });
            }
            // 洗牌
            cardValues = shuffleArray(cardValues);
            // 创建卡片状态
            cards.value = cardValues.map((card) => ({
                ...card,
                isFlipped: false,
                isMatched: false,
            }));
        };
        // 洗牌算法
        const shuffleArray = (array) => {
            const newArray = [...array];
            for (let i = newArray.length - 1; i > 0; i--) {
                const j = Math.floor(Math.random() * (i + 1));
                [newArray[i], newArray[j]] = [newArray[j], newArray[i]];
            }
            return newArray;
        };
        // 翻牌
        const flipCard = (index) => {
            const card = cards.value[index];
            // 如果卡片已经翻开或已匹配，则不做任何操作
            if (card.isFlipped || card.isMatched || flippedCards.value.length >=
                2) {
                return;
            }
            // 翻开卡片
            card.isFlipped = true;
            flippedCards.value.push(index);
            // 如果翻开了两张卡片，检查是否匹配
            if (flippedCards.value.length === 2) {
                tries.value++;
                const [firstIndex, secondIndex] = flippedCards.value;
                const firstCard = cards.value[firstIndex];
                const secondCard = cards.value[secondIndex];
                if (firstCard.value === secondCard.value) {
                    // 匹配成功
                    firstCard.isMatched = true;
                    secondCard.isMatched = true;
                    score.value += 10;
                    flippedCards.value = [];
                    // 检查游戏是否结束
                    if (cards.value.every((card) => card.isMatched)) {
                        gameOver.value = true;
                        score.value += remainingPairs.value * 5; // 剩余配对奖励
                    }
                } else {
                    // 匹配失败，翻回去
                    setTimeout(() => {
                        firstCard.isFlipped = false;
                        secondCard.isFlipped = false;
                        flippedCards.value = [];
                    }, 1000);
                }
            }
        };
        // 重置游戏
        const resetGame = () => {
            initializeGame();
        };
        // 改变难度
        const changeDifficulty = (level) => {
            difficulty.value = level;
            initializeGame();
        };
        // 初始化游戏
        onMounted(() => {
            initializeGame();
        });
        return {
            cards,
            flipCard,
            score,
            tries,
            remainingPairs,
            gameOver,
            resetGame,
            changeDifficulty,
            gridStyle,
            difficulty,
        };
    },
};
</script>
<style scoped>
.memory-game {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.game-info {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    padding: 10px;
    background-color: #f0f0f0;
    border-radius: 8px;
}

.cards-container {
    display: grid;
    grid-gap: 10px;
    margin: 0 auto;
    justify-content: center;
}

.card {
    position: relative;
    width: 100px;
    height: 100px;
    cursor: pointer;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    perspective: 1000px;
}

.card.flipped {
    transform: rotateY(180deg);
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.card-front {
    background-color: white;
    transform: rotateY(180deg);
}

.card-back {
    background: linear-gradient(135deg, #6e8efb, #a777e3);
    color: white;
    font-size: 24px;
}

.card.matched .card-front {
    background-color: #e0f7fa;
    border: 2px solid #4dd0e1;
}

.reset-btn {
    padding: 8px 16px;
    background-color: #4caf50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.reset-btn:hover {
    background-color: #45a049;
}

.game-over {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    z-index: 100;
}

.difficulty-selector {
    margin-bottom: 20px;
}

.difficulty-btn {
    padding: 8px 16px;
    margin: 0 5px;
    background-color: #2196f3;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.difficulty-btn.active {
    background-color: #0b7dda;
}
</style>